Lucky you

it's hard to get credit here so unless I can save up enough for those cards I'm stuck with my 5870 stuck onto a motherboard that can't even handle it's full power lol.
at least I think I can change the motherboard soon though so I can finally use it's full 400 khash lol
Your motherboard is not important for mining. On a pcie 1x slot your card will already mine at full capacity.